For the second of this weeks stories we turn to series 4's The Unicorn and the Wasp

In 1926, Agatha Christie mysteriously disappears, only to be found ten days later at Harrogate hotel, with no memory of what had happened to her. What could have been the cause? Was it a nervous breakdown? Was it a cry for help? Or was a giant alien wasp and a mysterious stranger known as the Doctor involved?

The Unicorn and the Wasp was the seventh episode of the fourth series of Doctor Who. It saw Doctor Who's take on the disappearance of Agatha Christie in 1926, giving a possible, yet unlikely answer as to why she vanished.

Full marks from me. This is one of my favourite stories from the fourth series. The woman who plays Agatha is excellent and very watchable. The story itself is fun and light and has some great one liners.

Same as Joshua really, this is no way my favourite episode of the series, but it isn't exactly bad either... This is one story that obviously required a lot of thinking to put it together, and it really has been put together brilliantly!

I was so close to giving it a 5, but I settled on a four instead. It's a great story and there are so many great, well written characters that it's hard to find fault with it, but the story feels a little like filler

I forgot to give this a mark! As with the general consensus, I really enjoyed this story. Beautifully scripted by Garath Roberts with lots of lovely little Christie references, I thought it had some great moments in it and was a fine romp for the Doctor and Donna. I gave it 4/5 - a very solid story and I enjoyed the rewatch